WO2022218035A1 - 一种恢复rrc连接的方法及终端、存储介质 - Google Patents

一种恢复rrc连接的方法及终端、存储介质 Download PDF

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Publication number
WO2022218035A1
WO2022218035A1 PCT/CN2022/077511 CN2022077511W WO2022218035A1 WO 2022218035 A1 WO2022218035 A1 WO 2022218035A1 CN 2022077511 W CN2022077511 W CN 2022077511W WO 2022218035 A1 WO2022218035 A1 WO 2022218035A1
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WIPO (PCT)
Prior art keywords
cell
terminal
timer
reselection
base station
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PCT/CN2022/077511
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English (en)
French (fr)
Inventor
高鸣
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Oppo广东移动通信有限公司
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Publication of WO2022218035A1 publication Critical patent/WO2022218035A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states

Definitions

  • the embodiments of the present application relate to the field of communications, and in particular, to a method, a terminal, and a storage medium for restoring an RRC connection.
  • the base station triggers the terminal to enter the inactive state through a Radio Resource Control (RRC) release message.
  • RRC Radio Resource Control
  • the T380 timer is started, and the terminal performs cell selection or cell reselection during the running process of the T380 timer; when the T380 timer is running
  • the terminal initiates a recovery RRC connection request with the base station notification area update (RAN-based Notification Area Update, RANU) as the recovery reason, and starts the T319 timer.
  • the base station notification area update RAN-based Notification Area Update, RANU
  • the terminal If the terminal does not receive a response message until the T319 timer expires, the terminal exits from the RRC inactive state and enters the RRC idle state, and the terminal in the RRC idle state needs to re-initiate the initial access process, which requires a longer access time. extension to access the network.
  • the embodiments of the present application provide a method, a terminal, and a storage medium for restoring an RRC connection, which can reduce the access delay of the terminal accessing the network.
  • An embodiment of the present application proposes a method for restoring an RRC connection, the method comprising:
  • the terminal initiates a request to restore the radio access control RRC connection in the first cell and starts the first timer; in the case that the response message sent by the base station is not received before the end of the first timer, obtain the reason for initiating the request to restore the RRC connection;
  • An embodiment of the present application proposes a terminal, where the terminal includes:
  • an obtaining unit used by the terminal to initiate a request for restoring the RRC connection of the radio access control in the first cell and start the first timer; in the case where the response message sent by the base station is not received before the end of the first timer, obtain and initiate the restoration of the RRC the reason for the connection request;
  • a cell reselection unit configured to perform cell reselection under the condition that the reason is the update of the base station notification area
  • a request initiating unit configured to initiate a request for resuming the RRC connection in the second cell in the case of reselection to the second cell;
  • a restarting unit configured to restart the first timer, so as to wait for receiving a response message sent by the base station during the running process of the first timer.
  • An embodiment of the present application provides a terminal, where the terminal includes: a processor, a memory, and a communication bus; when the processor executes a running program stored in the memory, the method as described in any of the above is implemented.
  • An embodiment of the present application provides a storage medium on which a computer program is stored, and when the computer program is executed by a processor, implements any of the methods described above.
  • FIG. 1 is a flowchart of a method for restoring an RRC connection according to an embodiment of the present application
  • FIG. 2 is a flowchart of an exemplary terminal performing RRC connection recovery provided by an embodiment of the present application
  • FIG. 3 is a schematic structural diagram 1 of a terminal according to an embodiment of the present application.
  • FIG. 4 is a second schematic structural diagram of a terminal according to an embodiment of the present application.
  • an embodiment of the present application proposes a method for restoring an RRC connection, the method comprising:
  • the terminal initiates a request to restore the radio access control RRC connection in the first cell and starts the first timer; in the case that the response message sent by the base station is not received before the end of the first timer, obtain the reason for initiating the request to restore the RRC connection;
  • cell reselection is performed based on the list of cells to be reselection.
  • the probability of being selected for the first cell during cell reselection is reduced.
  • the second cell satisfies the cell camping condition and the tracking area identifier broadcasted by the second cell is the same as the tracking area identifier of the first cell, it is characterized to reselect to the second cell.
  • the preset number of times threshold is a preset number of times threshold or a value of a connection establishment parameter broadcast by the first cell.
  • the The terminal switches to the RRC idle state.
  • the first timer is a T319 timer.
  • an embodiment of the present application provides a terminal, where the terminal includes:
  • the acquiring unit is configured for the terminal to initiate a request for restoring the RRC connection of the radio access control in the first cell and start the first timer; in the case where the response message sent by the base station is not received before the end of the running of the first timer, acquire and initiate the restoration of the RRC the reason for the connection request;
  • a cell reselection unit configured to perform cell reselection under the condition that the reason is the update of the base station notification area
  • a request initiating unit configured to initiate a request for restoring the RRC connection in the second cell in the case of reselection to the second cell
  • a restarting unit configured to restart the first timer, so as to wait for receiving a response message sent by the base station during the running process of the first timer.
  • the terminal further includes: an update unit;
  • the updating unit is configured to add one to the timeout times of the first timer to obtain the updated timeout times
  • the cell reselection unit is further configured to perform cell reselection based on the list of cells to be reselected when the updated timeout times are less than the preset times threshold.
  • the updating unit is further configured to reduce the selection probability of the first cell during cell reselection.
  • the updating unit is further configured to remove the first cell from the list of cells to be reselected, or to reduce the sorting weight of the first cell in the list of cells to be reselected.
  • the cell reselection unit is configured to be configured in the case that the second cell satisfies the cell camping condition and the tracking area identifier broadcast by the second cell is the same as the tracking area identifier of the first cell Next, the characterization is reselected to the second cell.
  • the preset number of times threshold is a preset number of times threshold or a value of a connection establishment parameter broadcast by the first cell.
  • the terminal further includes: a switching unit;
  • the handover unit is configured to perform cell switching based on the list of cells to be reselection when the reason is not the base station notification area update, or the number of timeouts after the first update is greater than or equal to the preset number of times threshold, or based on the list of cells to be reselection. In the case of reselection failure, the terminal switches to the RRC idle state.
  • the first timer is a T319 timer.
  • an embodiment of the present application proposes a terminal, where the terminal includes: a processor, a memory, and a communication bus; when the processor executes a running program stored in the memory, the following method for restoring an RRC connection is implemented:
  • the terminal initiates a request to restore the radio access control RRC connection in the first cell and starts the first timer; in the case that the response message sent by the base station is not received before the end of the first timer, obtain the reason for initiating the request to restore the RRC connection;
  • the processor is further configured to add one to the timeout times of the first timer to obtain the updated timeout times; in the case that the updated timeout times are less than the preset times threshold, Cell reselection is performed based on the list of cells to be reselection.
  • the processor is further configured to reduce the selection probability of the first cell during cell reselection.
  • the processor is further configured to exclude the first cell from the list of cells to be reselected, or reduce the sorting weight of the first cell in the list of cells to be reselected.
  • the processor is further configured to, when the second cell satisfies the cell camping condition and the tracking area identifier broadcast by the second cell is the same as the tracking area identifier of the first cell , which characterizes reselection to the second cell.
  • the preset number of times threshold is a preset number of times threshold or a value of a connection establishment parameter broadcast by the first cell.
  • the processor is further configured to: when the reason is not the update of the base station notification area, or the number of timeouts after the update is greater than or equal to the preset number of times threshold, or based on the In the case that the cell reselection by selecting the cell list fails, the terminal switches to the RRC idle state.
  • the first timer is a T319 timer.
  • an embodiment of the present application provides a storage medium on which a computer program is stored, and when the computer program is executed by a processor, implements any of the methods described above.
  • the embodiment of the present application provides a method, a terminal, and a storage medium for restoring an RRC connection.
  • the method includes: the terminal initiates a request for restoring the RRC connection of the radio access control in a first cell and starts a first timer; If the response message sent by the base station is not received before the end, obtain the reason for initiating the request to resume the RRC connection; if the reason is the update of the base station notification area, perform cell reselection; in the case of reselection to the second cell, in the In the second cell, a request for restoring the RRC connection is initiated, and the first timer is restarted, so as to wait for the response message sent by the base station to be received during the running process of the first timer.
  • the terminal first obtains the reason for initiating the request to resume the RRC connection. Since the Resume process triggered by the update of the base station notification area will not be perceived by the user, it is not sensitive to the access delay requirement. Therefore, in this scenario, the terminal is in the first When a response message sent by the base station is not received before the timer runs out, the terminal does not directly enter the RRC idle state, but tries to reselect to another second cell. After the reselection is successful, the terminal initiates recovery in the second cell again. The RRC connection request is made and the first timer is restarted. At this time, when there is a service requirement that requires the terminal to access the network, the terminal can directly resume the RRC connection from the RRC inactive state through the Resume process, thereby reducing the time for the terminal to access the network. extension.
  • the terminal parses the RRCRelease message.
  • the terminal uses the corresponding configuration to update the access stratum (Access Stratum, AS) context saved in its RRC inactive state, and starts T380 timing
  • the device enables the terminal to enter the RRC inactive state from the RRC connected state, or keeps the terminal in the RRC inactive state, and performs cell selection or cell reselection.
  • the terminal in the RRC inactive state After the terminal in the RRC inactive state completes the cell selection or cell reselection, the cell information indicated in the SIB1 broadcast by the new cell is not in the ran-NotificationAreaInfo list saved in the AS context, that is, an RNA change occurs; or The T380 timer expires, that is, the periodic RNAU triggers.
  • the terminal initiates the RRC Resume (RRC Resume) process with RNAU as the recovery reason, sends the RRCResumeRequest or RRCResumeRequest1 message to the base station, and starts the T319 timer, waiting for the RRCResume response message returned by the base station.
  • RRC Resume RRC Resume
  • the terminal If the terminal does not successfully receive the RRCResume message replied by the base station until the T319 timer expires, at present, the terminal will exit from the RRC inactive state and enter the RRC idle state. When there is another service requirement, the terminal needs to access the network through the initial access method, thereby increasing the delay for the terminal to access the network.
  • the method may include:
  • the terminal initiates a request for resuming the RRC connection of the radio access control in the first cell and starts a first timer; in the case where the response message sent by the base station is not received before the end of the running of the first timer, obtain the request for initiating the resumption of the RRC connection. reason.
  • the terminal for restoring the RRC connection may be any device with communication and storage functions, such as but not limited to: chips, tablet computers, mobile phones, personal computers (Personal Computer, PC), notebook computers, wearable equipment, etc.
  • the first timer is a timer such as a T319 timer, which is used to control the terminal to wait for the base station to send a response message responding to the RRC connection request. .
  • the terminal in the RRC inactive state initiates a request for resuming the RRC connection in the first cell where it currently resides, that is, executes the RRCResume process, and starts the T319 timer, and the T319 timer is set with a running duration. Waiting for the response message sent by the base station to respond to the RRC connection restoration request within the running duration of the T319 timer, if the terminal does not receive the response message from the base station until the running duration of the T319 timer reaches and the T319 timer stops running , the terminal obtains the reason for initiating the request to restore the RRC connection.
  • the terminal since the terminal initiates the restoration of the RRC connection in the first cell through triggers of different reasons, the terminal can directly obtain the reason for initiating the restoration of the RRC connection.
  • this application will perform at least one process of cell reselection or cell selection. Therefore, the reason for this application to perform cell reselection must be a process that is not sensitive to time delay requirements; since the RNAU process is due to the mobility of the terminal It is caused by the change of the location update area. Therefore, the duration of the process of restoring the RRC connection caused by the RANU will not be perceived by the user, which satisfies the conditions for cell reselection in this application.
  • the cell reselection is performed based on the list of cells to be reselection.
  • the probability of being selected for the first cell during cell reselection is reduced.
  • the probability of being selected for the first cell during cell reselection can be reduced in the following two ways.
  • the sorting weight in the reselection cell list At this time, when the cell reselection is performed based on the to-be-reselected cell list, the probability of being selected for the first cell can be reduced.
  • the process for the terminal to perform cell reselection may be:
  • the cells in the list of cells to be reselected are sequentially reselected, wherein the list of cells to be reselected can be sorted in descending order of cell signal quality, and for the first cell, the number of cells to be reselected is reduced in the list of cells to be reselected.
  • the sorting weight is used to reduce the probability of the first cell being selected in this round of cell reselection.
  • the terminal in the scenario where the terminal removes the first cell from the list of cells to be reselected, since the terminal also has a RANU failed cell list, which stores the cell identifiers of the previous RANU failures, the terminal When the first cell is added to the RANU failed cell list, the terminal performs cell reselection as follows: the terminal excludes the cells in the RANU failed cell list, and performs cell reselection based on the to-be-reselected cell list.
  • the maximum number of failed RNAU attempts is limited by setting a preset number of times threshold, and the preset number of times threshold in this embodiment of the present application may be a number of times threshold preset by the terminal, or for multiplexing the first cell broadcast.
  • the connection parameter connEstFailCount value is established in the system information block 1 (System Information Block, SIB1) of the system information block 1 (System Information Block, SIB1), and the setting basis of the specific preset number of times threshold value can be selected according to the actual situation, and the embodiment of the present application does not make specific restrictions.
  • the preset number of thresholds may be set between 1 and 4, and the specific selection is made according to the actual situation, which is not specifically limited in this embodiment of the present application.
  • the initial timeout times corresponding to the first timer are zero, and thereafter, each time it is determined that the cause is the update of the base station notification area, the timeout times of the first timer are accumulated once.
  • the terminal when the number of timeouts after the update is greater than or equal to the preset number of thresholds, or the cell reselection fails based on the list of cells to be reselection, or the reason is not the update of the base station notification area, the terminal directly exits from the RRC inactive state. And enter the RRC idle state without the process of cell reselection.
  • the terminal when the terminal determines that the second cell in the list of cells to be reselected satisfies the cell camping condition, and the tracking area identifier broadcast by the second cell is the same as the tracking area identifier of the first cell, the terminal characterizes the terminal. Reselect to the second cell.
  • the terminal initiates a request to restore the RRC connection in the second cell, restarts the T319 timer, and waits to receive the response message sent by the base station during the operation of the T319 timer; at the end of the T319 timer operation If the response message has not been received, the terminal continues to obtain the reason for initiating the request to restore the RRC connection, and executes the process of restoring the RRC connection; if the response message is received before the T319 timer runs out, the terminal continues to be in the RRC disconnected state .
  • the signal quality of the first cell is higher than the signal quality of the second cell.
  • the terminal first obtains the reason for initiating the request to resume the RRC connection, because the Resume process triggered by the update of the base station notification area will not be perceived by the user and is not sensitive to the access delay requirement. Therefore, in this scenario, the terminal is in the first When a response message sent by the base station is not received before the timer runs out, the terminal does not directly enter the RRC idle state, but tries to reselect to another second cell. After the reselection is successful, the terminal initiates recovery in the second cell again. The RRC connection request is made and the first timer is restarted.
  • the terminal can directly restore the RRC connection from the RRC inactive state through the Resume process. Because the RRC inactive state is for the terminal when there is no service In the case of demand, the connection between the terminal and the access network is released, but the connection state of the non-access stratum (Non-Access Stratum, NAS) access management (Connection Management, CM) is still maintained. And the terminal can move within the base station notification area (RAN-based Notification Area, RNA) without notifying the access and mobility management unit (Access and Mobility Management Function, AMF), the last base station serving the terminal retains its context and reserves It is connected with the AMF and the user plane unit (User Plane Function, UPF). Therefore, a method for restoring the RRC connection proposed in this application can reduce the access delay of the terminal accessing the network.
  • RAN-based Notification Area, RNA base station notification area
  • AMF Access and Mobility Management Function
  • the terminal initiates the Resume process in cell 1 and starts the T319 timer.
  • the specific process of restoring the RRC connection performed by the terminal may be as shown in Figure 2, and specifically includes:
  • the terminal determines the reason for initiating the Resume process
  • the terminal adds cell 1 to the RNAU failed cell list, and excludes cells in the RNAU failed cell list and performs cell reselection;
  • the tracking area identifier in the SIB1 broadcast by the cell 2 is the same as the tracking area identifier of the cell 1, it indicates that the terminal is successfully reselected to the cell 2;
  • the terminal initiates the RRCResume request in cell 2, restarts the T319 timer, and waits for the RRCResume response message during the T319 operation;
  • the terminal exits from the RRC inactive state and enters the RRC idle state.
  • an embodiment of the present application further provides a terminal.
  • the terminal 1 includes:
  • the obtaining unit 10 is used for the terminal to initiate a request for restoring the radio access control RRC connection in the first cell and start the first timer; in the case where the response message sent by the base station is not received before the end of the running of the first timer, obtain and initiate the restoration The reason for the RRC connection request;
  • a cell reselection unit 11 configured to perform cell reselection under the condition that the reason is the update of the base station notification area
  • a request initiating unit 12 configured to initiate a request for restoring the RRC connection in the second cell in the case of reselection to the second cell;
  • the restarting unit 13 is configured to restart the first timer, so as to wait for the response message sent by the base station to be received during the running process of the first timer.
  • the terminal further includes: an update unit;
  • the updating unit is configured to add one to the timeout times of the first timer to obtain the updated timeout times
  • the cell reselection unit 11 is further configured to perform cell reselection based on the list of to-be-reselected cells when the updated timeout times are less than the preset times threshold.
  • the updating unit is further configured to reduce the selection probability of the first cell during cell reselection.
  • the updating unit is further configured to remove the first cell from the list of cells to be reselected, or reduce the sorting weight of the first cell in the list of cells to be reselected.
  • the cell reselection unit 11 is configured to be used when the second cell satisfies the cell camping condition and the tracking area identifier broadcast by the second cell is the same as the tracking area identifier of the first cell Next, the characterization is reselected to the second cell.
  • the preset number of times threshold is a preset number of times threshold or a value of a connection establishment parameter broadcast by the first cell.
  • the terminal further includes: a switching unit;
  • the switching unit is configured to perform cell switching based on the list of cells to be reselection when the reason is not the update of the base station notification area, or the number of timeouts after the first update is greater than or equal to the preset number of thresholds, or based on the list of cells to be reselected. In the case of reselection failure, the terminal switches to the RRC idle state.
  • the first timer is a T319 timer.
  • the terminal initiates a request to restore a radio access control RRC connection in a first cell and starts a first timer; in the case where a response message sent by a base station is not received before the end of the running of the first timer , obtain the reason for initiating the request to restore the RRC connection; if the reason is the update of the base station notification area, perform cell reselection; in the case of reselection to the second cell, initiate the request to restore the RRC connection in the second cell, and restart
  • the first timer is used to wait for the response message sent by the base station to be received during the running process of the first timer.
  • the terminal first obtains the reason for initiating the request to resume the RRC connection. Since the Resume process triggered by the update of the base station notification area will not be perceived by the user, it is not sensitive to the access delay requirement. Therefore, in this In the scenario, when the terminal does not receive the response message sent by the base station before the first timer expires, the terminal does not directly enter the RRC idle state, but tries to reselect to another second cell. The second cell again initiates a request to resume the RRC connection and restarts the first timer. At this time, when there is a service requirement that requires the terminal to access the network, the terminal can directly resume the RRC connection from the RRC inactive state through the Resume process.
  • the state is for the UE to release the connection between the UE and the access network when there is no service requirement, but still maintain the connection state of the NAS layer CM. Moreover, the UE can move in the RNA area without notifying the AMF, and the last base station serving the UE retains its context and keeps its connection with the AMF and UPF, thereby reducing the access delay of the terminal accessing the network.
  • FIG. 4 is a second schematic diagram of the composition and structure of a terminal 1 according to an embodiment of the present application.
  • the terminal 1 in this embodiment includes: a processor 14. Memory 15 and communication bus 16.
  • the above-mentioned obtaining unit 10, cell reselection unit 11, request initiating unit 12, restarting unit 13, updating unit and switching unit may be implemented by the processor 14 located on the terminal 1, and the above-mentioned processor 14 may Application Specific Integrated Circuit (ASIC, Application Specific Integrated Circuit), Digital Signal Processor (DSP, Digital Signal Processor), Digital Signal Processing Image Processing Device (DSPD, Digital Signal Processing Device), Programmable Logic Image Processing Device (PLD, At least one of Programmable Logic Device), Field Programmable Gate Array (FPGA, Field Programmable Gate Array), CPU, controller, microcontroller, and microprocessor.
  • ASIC Application Specific Integrated Circuit
  • DSP Digital Signal Processor
  • DSPD Digital Signal Processing Image Processing Device
  • PLD Programmable Logic Image Processing Device
  • FPGA Field Programmable Gate Array
  • CPU controller, microcontroller, and microprocessor.
  • the above-mentioned communication bus 16 is used to realize the connection communication between the processor 14 and the memory 15; when the above-mentioned processor 14 executes the running program stored in the memory 15, the following method for restoring the RRC connection is implemented:
  • the terminal initiates a request to restore the radio access control RRC connection in the first cell and starts the first timer; in the case that the response message sent by the base station is not received before the end of the first timer, obtain the reason for initiating the request to restore the RRC connection; In the case that the reason is the base station notification area update, perform cell reselection; in the case of reselection to the second cell, initiate a recovery RRC connection request in the second cell, and restart the first timing
  • the device is configured to wait for the response message sent by the base station to be received during the running process of the first timer.
  • the above-mentioned processor 14 is further configured to add one to the number of timeouts of the first timer to obtain the number of timeouts after updating; the number of timeouts after the update is less than the preset number of times In the case of the threshold, cell reselection is performed based on the list of cells to be reselection.
  • the above-mentioned processor 14 is further configured to reduce the selection probability of the first cell during cell reselection.
  • the above-mentioned processor 14 is further configured to remove the first cell from the list of cells to be reselected, or to reduce the first cell from the list of cells to be reselected Sort weights in .
  • the processor 14 is further configured to satisfy the cell camping condition in the second cell, and the tracking area identifier broadcasted by the second cell and the tracking area of the first cell If the identities are the same, the characterization is reselected to the second cell.
  • the preset number of times threshold is a preset number of times threshold or a value of a connection establishment parameter broadcast by the first cell.
  • the above-mentioned processor 14 is further configured to, when the reason is not the update of the base station notification area, or the number of timeouts after the update is greater than or equal to the preset number of times threshold, or In the case that the cell reselection fails based on the to-be-reselected cell list, the terminal switches to the RRC idle state.
  • the first timer is a T319 timer.
  • An embodiment of the present application provides a storage medium on which a computer program is stored, the computer-readable storage medium stores one or more programs, and the one or more programs can be executed by one or more processors and applied to a terminal , the computer program implements the method for restoring an RRC connection as described above.
  • the method of the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is better implementation.
  • the technical solutions of the present disclosure can be embodied in the form of software products in essence or the parts that make contributions to related technologies.
  • the computer software products are stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) ), including several instructions for causing an image display device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in the various embodiments of the present disclosure.

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Abstract

本申请实施例提供了一种恢复RRC连接的方法及终端、存储介质，该方法包括：终端在第一小区发起恢复无线接入控制RRC连接请求并启动第一定时器；在第一定时器运行结束前未接收到基站发送的响应消息的情况下，获取发起恢复RRC连接请求的原因；在原因为基站通知区更新的情况下，进行小区重选；在重选至第二小区的情况下，在第二小区中发起恢复RRC连接请求，并重新启动第一定时器，以在第一定时器运行过程中等待接收基站发送的响应消息。

Description

一种恢复RRC连接的方法及终端、存储介质
相关申请的交叉引用
本申请基于申请号为202110414379.0、申请日为2021年04月16日，申请名称为“一种恢复RRC连接的方法及终端、存储介质”的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此以引入方式结合在本申请中。
技术领域
本申请实施例涉及通信领域，尤其涉及一种恢复RRC连接的方法及终端、存储介质。
背景技术
基站通过无线资源控制(Radio Resource Control，RRC)release消息触发终端进入非激活状态，此时，启动T380定时器，终端在T380定时器的运行过程中执行小区选择或者小区重选；当T380定时器超时、或者终端完成小区选择或者小区重选后发生了RNA变化时，终端以基站通知区更新(RAN-based Notification Area Update，RANU)作为恢复原因发起恢复RRC连接请求，并启动T319定时器，在T319定时器的运行过程中等待基站回复的恢复RRC连接的响应消息。
如果直到T319定时器超时终端均未收到响应消息时，终端从RRC非激活态退出并进入RRC空闲状态，处于RRC空闲状态的终端需要重新发起初始接入过程，进而需要更长的接入时延来接入网络。
发明内容
本申请实施例提供一种恢复RRC连接的方法及终端、存储介质，能够减少终端接入网络的接入时延。
为解决上述问题，本申请是这样实现的：
本申请实施例提出一种恢复RRC连接的方法，所述方法包括：
终端在第一小区发起恢复无线接入控制RRC连接请求并启动第一定时器；在第一定时器运行结束前未接收到基站发送的响应消息的情况下，获取发起恢复RRC连接请求的原因；
在所述原因为基站通知区更新的情况下，进行小区重选；
在重选至第二小区的情况下，在所述第二小区中发起恢复RRC连接请求，并重新启动所述第一定时器，以在所述第一定时器运行过程中等待接收基站发送的响应消息。
本申请实施例提出一种终端，所述终端包括：
获取单元，用于终端在第一小区发起恢复无线接入控制RRC连接请求并启动第一定时器；在第一定时器运行结束前未接收到基站发送的响应消息的情况下，获取发起恢复RRC连接请求的原因；
小区重选单元，用于在所述原因为基站通知区更新的情况下，进行小区重选；
请求发起单元，用于在重选至第二小区的情况下，在所述第二小区中发起恢复RRC连接请求；
重启单元，用于重新启动所述第一定时器，以在所述第一定时器运行过程中等待接收基站发送的响应消息。
本申请实施例提出一种终端，所述终端包括：处理器、存储器及通信总线；所述处理器执行存储器存储的运行程序时实现如上述任一项所述的方法。
本申请实施例提出一种存储介质，其上存储有计算机程序，该计算机程序被处理器执行时实现如上述任一项所述的方法。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的一种恢复RRC连接的方法流程图；
图2为本申请实施例提供的一种示例性的终端执行恢复RRC连接的流程图；
图3为本申请实施例提供的一种终端的结构示意图一；
图4为本申请实施例提供的一种终端的结构示意图二。
具体实施方式
第一方面，本申请实施例提出一种恢复RRC连接的方法，所述方法包括：
终端在第一小区发起恢复无线接入控制RRC连接请求并启动第一定时器；在第一定时器运行结束前未接收到基站发送的响应消息的情况下，获取发起恢复RRC连接请求的原因；
在所述原因为基站通知区更新的情况下，进行小区重选；
在重选至第二小区的情况下，在所述第二小区中发起恢复RRC连接请求，并重新启动所述第一定时器，以在所述第一定时器运行过程中等待接收基站发送的响应消息。
在上述方法中，包括如下步骤：
将所述第一定时器的超时次数加一，得到更新后的超时次数；
在所述更新后的超时次数小于预设次数阈值的情况下，基于待重选小区列表进行小区重选。
在上述方法中，包括如下步骤：
降低所述第一小区在小区重选时的被选概率。
在上述方法中，包括如下步骤：
将所述第一小区从所述待重选小区列表中剔除、或降低所述第一小区在所述待重选小区列表中的排序权重。
在上述方法中，包括如下步骤：
在所述第二小区满足小区驻留条件、且所述第二小区广播的跟踪区标识和所述第一小区的跟踪区标识相同的情况下，表征重选至所述第二小区。
在上述方法中，所述预设次数阈值为预先设置的次数阈值或者所述第一小区广播的建立连接参数值。
在上述方法中，包括如下步骤：
在所述原因不为所述基站通知区更新、或者所述更新后的超时次数大于或者等于所述预设次数阈值、或者基于所述待重选小区列表进行小区重选失败的情况下，所述终端切换至RRC空闲态。
在上述方法中，所述第一定时器为T319定时器。
第二方面，本申请实施例提出一种终端，所述终端包括：
获取单元，配置为终端在第一小区发起恢复无线接入控制RRC连接请求并启动第一定时器；在第一定时器运行结束前未接收到基站发送的响应消息的情况下，获取发起恢复RRC连接请求的原因；
小区重选单元，配置为在所述原因为基站通知区更新的情况下，进行小区重选；
请求发起单元，配置为在重选至第二小区的情况下，在所述第二小区中发起恢复RRC连接请求；
重启单元，配置为重新启动所述第一定时器，以在所述第一定时器运行过程中等待接收基站发送的响应消息。
在上述终端中，所述终端还包括：更新单元；
所述更新单元，配置为将所述第一定时器的超时次数加一，得到更新后的超时次数；
所述小区重选单元，还配置为在所述更新后的超时次数小于预设次数阈值的情况下，基于待重选小区列表进行小区重选。
在上述终端中，所述更新单元，还配置为降低所述第一小区在小区重选时的被选概率。
在上述终端中，所述更新单元，还配置为将所述第一小区从所述待重选小区列表中剔除、或降低所述第一小区在所述待重选小区列表中的排序权重。
在上述终端中，所述小区重选单元，配置为在所述第二小区满足小区驻留条件、且所述第二小区广播的跟踪区标识和所述第一小区的跟踪区标识相同的情况下，表征重选至所述第二小区。
在上述终端中，所述预设次数阈值为预先设置的次数阈值或者所述第一小区广播的建立连接参数值。
在上述终端中，所述终端还包括：切换单元；
所述切换单元，配置为在所述原因不为所述基站通知区更新、或者所述第更新后的超时次数大于或者等于所述预设次数阈值、或者基于所述待重选小区列表进行小区重选失败的情况下，所述终端切换至RRC空闲态。
在上述终端中，所述第一定时器为T319定时器。
第三方面，本申请实施例提出一种终端，所述终端包括：处理器、存储器及通信总线；所述处理器执行存储器存储的运行程序时实现如下恢复RRC连接的方法：
终端在第一小区发起恢复无线接入控制RRC连接请求并启动第一定时器；在第一定时器运行结束前未接收到基站发送的响应消息的情况下，获取发起恢复RRC连接请求的原因；
在所述原因为基站通知区更新的情况下，进行小区重选；
在重选至第二小区的情况下，在所述第二小区中发起恢复RRC连接请求，并重新启动所述第一定时器，以在所述第一定时器运行过程中等待接收基站发送的响应消息。
在上述终端中，所述处理器，还用于将所述第一定时器的超时次数加一，得到更新后的超时次数；在所述更新后的超时次数小于预设次数阈值的情况下，基于待重选小区列表进行小区重选。
在上述终端中，所述处理器，还用于降低所述第一小区在小区重选时的被选概率。
在上述终端中，所述处理器，还用于将所述第一小区从所述待重选小区列表中剔除、或降低所述第一小区在所述待重选小区列表中的排序权重。
在上述终端中，所述处理器，还用于在所述第二小区满足小区驻留条件、且所述第二小区广播的跟踪区标识和所述第一小区的跟踪区标识相同的情况下，表征重选至所述第二小区。
在上述终端中，所述预设次数阈值为预先设置的次数阈值或者所述第一小区广播的建立连接参数值。
在上述终端中，所述处理器，还用于在所述原因不为所述基站通知区更新、或者所述更新后的超时次数大于或者等于所述预设次数阈值、或者基于所述待重选小区列表进行小区重选失败的情况下，所述终端切换至RRC空闲态。
在上述终端中，所述第一定时器为T319定时器。
第四方面，本申请实施例提出一种存储介质，其上存储有计算机程序，该计算机程序被处理器执行时实现如上述任一项所述的方法。
本申请实施例提供了一种恢复RRC连接的方法及终端、存储介质，该方法包括：终端在第一小区发起恢复无线接入控制RRC连接请求并启动第一定时器；在第一定时器运行结束前未接收到基站发送的响应消息的情况下，获取发起恢复RRC连接请求的原因；在原因为基站通知区更新的情况下，进行小区重选；在重选至第二小区的情况下，在第二小区中发起恢复RRC连接请求，并重新启动第一定时器，以在第一定时器运行过程中等待接收基站发送的响应消息。采用上述实现方案，终端先获取发起恢复RRC连接请求的原因，由于基站通知区更新触发的Resume过程不会被用户感知，对接入时延要求不敏感，故，在 该场景下、终端在第一定时器运行结束前未接收到基站发送的响应消息时，终端不直接进入RRC空闲态，而是尝试重选至其他的第二小区，在重选成功之后，终端在第二小区再次发起恢复RRC连接请求，并重启第一定时器，此时，有业务需求需要终端接入网络时，终端可以直接从RRC非激活态通过Resume过程恢复RRC连接，进而降低了终端接入网络的接入时延。
应当理解，此处描述的具体实施例仅仅用以解释本申请。并不用于限定本申请。
在终端接收RRCRelease消息之后，终端解析RRCRelease消息，当RRCRelease消息中存在suspendConfig时，终端使用对应的配置，更新其RRC非激活态所保存的接入层(Access Stratum，AS)上下文，并启动T380定时器，使得终端从RRC连接态进入RRC非激活态、或使得终端继续保持在RRC非激活态，执行小区选择或者小区重选。
在处于RRC非激活态的终端在小区选择或者小区重选完成后，新的小区所广播的SIB1中指示的小区信息不在AS上下文中所保存的ran-NotificationAreaInfo列表中，即发生了RNA变化；或者T380定时器超时，即周期性的RNAU触发。此时，终端以RNAU作为恢复原因发起RRC Resume(RRC恢复)流程，向基站发送RRCResumeRequest或者RRCResumeRequest1消息，并启动T319定时器，等待基站回复的RRCResume响应消息。
若直到T319定时器超时、终端都未成功接收到基站回复的RRCResume消息时，目前，终端会从RRC非激活态退出并进入RRC空闲状态。当再有业务需求时，终端需通过初始进入的方式接入到网络中，由此增加了终端接入网络的时延。
为解决上述问题，提出了一种恢复RRC连接的方法，能够减少终端接入网络的时延；如图1所示，该方法可以包括：
S101、终端在第一小区发起恢复无线接入控制RRC连接请求并启动第一定时器；在第一定时器运行结束前未接收到基站发送的响应消息的情况下，获取发起恢复RRC连接请求的原因。
本申请实施例中，实现恢复RRC连接的终端可以为任何具备通信和存储功能的设备，例如包括但不限于：芯片、平板电脑、手机、个人计算机(Personal Computer，PC)、笔记本电脑、可穿戴设备等设备。
需要说明的是，第一定时器为T319定时器等用于控制终端等待基站发送响应RRC连接请求的响应消息的定时器，具体的可以根据实际情况进行选择，本申请实施例不做具体的限定。
本申请实施例中，处于RRC非激活态的终端在当前驻留的第一小区中发起恢复RRC连接请求，即执行RRCResume流程，并启动T319定时器，而T319定时器设置有运行时长，终端在T319定时器的运行时长内等待接收基站发送的响应该恢复RRC连接请求的响应消息，若直到T319定时器的运行时长到达、T319定时器停止运行时，终端未接收到基站的响应消息的情况下，终端获取发起恢复RRC连接请求的原因。
本申请实施例中，触发终端在第一小区发起恢复RRC连接请求的原因有多 种，可以包括RANU过程、5G无线接入网(NG-RAN)寻呼过程或者终端高层业务需求等，具体的根据实际情况进行选择，本申请实施例不做具体的限定。
需要说明的是，由于终端是通过不同原因的触发而在第一小区发起恢复RRC连接的，由此，终端可直接获取到发起恢复RRC连接的原因。
S102、在原因为基站通知区更新的情况下，进行小区重选。
需要说明的是，本申请会进行至少一次小区重选或小区选择的过程，故，本申请进行小区重选的原因一定是对时延要求不敏感的过程；由于RNAU过程是由于终端的移动性而导致位置更新区变化而引起的，因此，由RANU原因引起的恢复RRC连接这个过程的时长不会被用户感知，满足本申请进行小区重选的条件。
需要说明的是，在原因为基站通知区更新的情况下，将第一定时器的超时次数加一，得到更新后的超时次数；并将更新后的超时次数与预设次数阈值进行比较，在更新后的超时次数小于预设次数阈值的情况下，基于待重选小区列表进行小区重选。
需要说明的是，在原因为基站通知区更新的情况下，降低第一小区在小区重选时的被选概率。
具体的，可以通过以下两种方式降低第一小区在小区重选时的被选概率，第一种是将第一小区从待重选小区列表中剔除，第二种是降低第一小区在待重选小区列表中的排序权重，此时在基于待重选小区列表进行小区重选时，即可降低第一小区的被选概率。
需要说明的是，以上两种方式仅为本申请提出的两种可选的方法，本申请不仅限于以上两种方式，具体的可以根据实际情况进行选择，本申请实施例不做具体的限定。
在一种可选的实施例中，终端降低第一小区在待重选小区列表中的排序权重的场景下，终端进行小区重选的过程可以为：终端按照待重选小区列表的小区排列顺序依次重选至待重选小区列表中的小区，其中，该待重选小区列表可以按照小区信号质量从高到低的顺序进行排序、且对于第一小区，在待重选小区列表中降低其排序权重，以降低第一小区在本轮小区重选过程中的被选概率。
在另一种可选的实施例中，终端将第一小区从待重选小区列表中剔除的场景下，由于终端内还设置有RANU失败小区列表，其中存储有之前RANU失败的小区标识，终端将第一小区添加至RANU失败小区列表中，终端进行小区重选的过程可以为：终端排除该RANU失败小区列表中的小区，并基于待重选小区列表执行小区重选。
可选的，本申请实施例通过设置预设次数阈值来限制最大的RNAU失败尝试次数，本申请实施例中的预设次数阈值可以是终端预先设置的次数阈值，或者为复用第一小区广播的系统信息块1(System Information Block，SIB1)中建立连接参数connEstFailCount值，具体的预设次数阈值的设置依据可以根据实际情况进行选择，本申请实施例不做具体的限定。
在实际应用中，可以将预设次数阈值设置在1-4之间，具体的根据实际情况进行选择，本申请实施例不做具体的限定。
需要说明的是，在终端启动第一定时器时，第一定时器对应的初始超时次数为零，之后，每确定出原因为基站通知区更新时，第一定时器的超时次数进行一次累加。
进一步地，当更新后的超时次数大于或者等于预设次数阈值、或者基于待重选小区列表进行小区重选失败、或者原因不为基站通知区更新的情况下，终端直接从RRC非激活态退出并进入RRC空闲状态，而不进行小区重选的过程。
S103、在重选至第二小区的情况下，在第二小区中发起恢复RRC连接请求，并重新启动第一定时器，以在第一定时器运行过程中等待接收基站发送的响应消息。
本申请实施例中，终端在判断出待重选小区列表中的第二小区满足小区驻留条件，且第二小区广播的跟踪区标识与第一小区的跟踪区标识相同的情况下，表征终端重选至第二小区，此时，终端在第二小区中发起恢复RRC连接请求、重启T319定时器，并在T319定时器运行过程中等待接收基站发送的响应消息；在T319定时器运行结束时还未接收到响应消息的情况下，继续获取发起恢复RRC连接请求的原因，并执行恢复RRC连接的过程；在T319定时器运行结束前接收到响应消息的情况下，终端继续处于RRC非连接态。
需要说明的是，第一小区的信号质量高与第二小区的信号质量。
可以理解的是，终端先获取发起恢复RRC连接请求的原因，由于基站通知区更新触发的Resume过程不会被用户感知，对接入时延要求不敏感，故，在该场景下、终端在第一定时器运行结束前未接收到基站发送的响应消息时，终端不直接进入RRC空闲态，而是尝试重选至其他的第二小区，在重选成功之后，终端在第二小区再次发起恢复RRC连接请求，并重启第一定时器，此时，有业务需求需要终端接入网络时，终端可以直接从RRC非激活态通过Resume过程恢复RRC连接，由于RRC非激活态是为了终端在没有业务需求的情况下，释放终端与接入网的连接，但仍然保持非接入层(Non-Access Stratum，NAS)接入管理(Connection Management，CM)的连接状态。并且终端可以在基站通知区域(RAN-based Notification Area，RNA)内移动而不用通知接入和移动管理单元(Access and Mobility Management Function，AMF)，为终端提供服务的最后一个基站保留其上下文并保留其与AMF和用户面单元(User Plane Function，UPF)的连接，故，本申请提出的一种恢复RRC连接的方法可以降低终端接入网络的接入时延。
基于上述实施例，终端在小区1发起Resume流程，并启动T319定时器，在T319定时器超时之后，终端执行的恢复RRC连接的具体过程可以如图2所示，具体包括：
1、终端确定发起Resume流程的原因；
2、若发起Resume流程的原因为RANU，将T319的超时次数加一，得到T319的超时总次数；
3、在T319的超时总次数小于预设次数阈值时，终端将小区1添加至RNAU失败小区列表中，并排除RNAU失败小区列表中的小区并进行小区重选；
4、若小区2满足小区驻留条件、且小区2广播的SIB1中的跟踪区标识与 小区1的跟踪区标识相同，表征终端成功重选至小区2；
5、终端在小区2中发起RRCResume请求，重启T319定时器，并在T319运行过程中等待RRCResume响应消息；
6、若T319运行结束时未接收到RRCResume响应消息时，执行1；
7、若T319运行结束前接收到RRCResume响应消息时，终端保持在RRC非激活态；
8、在T319的超时总次数大于或者等于预设次数阈值时，执行11；
9、在小区重选失败时，执行11；
10、若发起Resume流程的原因不为RANU，执行11；
11、终端从RRC非激活态退出，并进入RRC空闲态。
基于上述实施例，本申请实施例还提供一种终端。如图3所示，该终端1包括：
获取单元10，用于终端在第一小区发起恢复无线接入控制RRC连接请求并启动第一定时器；在第一定时器运行结束前未接收到基站发送的响应消息的情况下，获取发起恢复RRC连接请求的原因；
小区重选单元11，用于在所述原因为基站通知区更新的情况下，进行小区重选；
请求发起单元12，用于在重选至第二小区的情况下，在所述第二小区中发起恢复RRC连接请求；
重启单元13，用于重新启动所述第一定时器，以在所述第一定时器运行过程中等待接收基站发送的响应消息。
可选的，所述终端还包括：更新单元；
所述更新单元，用于将所述第一定时器的超时次数加一，得到更新后的超时次数；
所述小区重选单元11，还用于在所述更新后的超时次数小于预设次数阈值的情况下，基于待重选小区列表进行小区重选。
可选的，所述更新单元，还用于降低所述第一小区在小区重选时的被选概率。
可选的，所述更新单元，还用于将所述第一小区从所述待重选小区列表中剔除、或降低所述第一小区在所述待重选小区列表中的排序权重。
可选的，所述小区重选单元11，用于在所述第二小区满足小区驻留条件、且所述第二小区广播的跟踪区标识和所述第一小区的跟踪区标识相同的情况下，表征重选至所述第二小区。
可选的，所述预设次数阈值为预先设置的次数阈值或者所述第一小区广播的建立连接参数值。
可选的，所述终端还包括：切换单元；
所述切换单元，用于在所述原因不为所述基站通知区更新、或者所述第更新后的超时次数大于或者等于所述预设次数阈值、或者基于所述待重选小区列表进行小区重选失败的情况下，所述终端切换至RRC空闲态。
可选的，所述第一定时器为T319定时器。
本申请实施例提供的一种终端，终端在第一小区发起恢复无线接入控制RRC连接请求并启动第一定时器；在第一定时器运行结束前未接收到基站发送的响应消息的情况下，获取发起恢复RRC连接请求的原因；在原因为基站通知区更新的情况下，进行小区重选；在重选至第二小区的情况下，在第二小区中发起恢复RRC连接请求，并重新启动第一定时器，以在第一定时器运行过程中等待接收基站发送的响应消息。由此可见，本实施例提出的终端，终端先获取发起恢复RRC连接请求的原因，由于基站通知区更新触发的Resume过程不会被用户感知，对接入时延要求不敏感，故，在该场景下、终端在第一定时器运行结束前未接收到基站发送的响应消息时，终端不直接进入RRC空闲态，而是尝试重选至其他的第二小区，在重选成功之后，终端在第二小区再次发起恢复RRC连接请求，并重启第一定时器，此时，有业务需求需要终端接入网络时，终端可以直接从RRC非激活态通过Resume过程恢复RRC连接，由于，RRC非激活态是为了UE在没有业务需求的情况下，释放UE与接入网的连接，但仍然保持NAS层CM的连接状态。并且UE可以在RNA区域内移动而不用通知AMF，为UE提供服务的最后一个基站保留其上下文并保留其与AMF和UPF的连接，进而能够降低终端接入网络的接入时延。
图4为本申请实施例提供的一种终端1的组成结构示意图二，在实际应用中，基于上述实施例的同一公开构思下，如图4所示，本实施例的终端1包括：处理器14、存储器15及通信总线16。
在具体的实施例的过程中，上述获取单元10、小区重选单元11、请求发起单元12、重启单元13、更新单元和切换单元可由位于终端1上的处理器14实现，上述处理器14可以为特定用途集成电路(ASIC，Application Specific Integrated Circuit)、数字信号处理器(DSP，Digital Signal Processor)、数字信号处理图像处理装置(DSPD，Digital Signal Processing Device)、可编程逻辑图像处理装置(PLD，Programmable Logic Device)、现场可编程门阵列(FPGA，Field Programmable Gate Array)、CPU、控制器、微控制器、微处理器中的至少一种。可以理解地，对于不同的设备，用于实现上述处理器功能的电子器件还可以为其它，本实施例不作具体限定。
在本申请实施例中，上述通信总线16用于实现处理器14和存储器15之间的连接通信；上述处理器14执行存储器15中存储的运行程序时实现如下恢复RRC连接的方法：
终端在第一小区发起恢复无线接入控制RRC连接请求并启动第一定时器；在第一定时器运行结束前未接收到基站发送的响应消息的情况下，获取发起恢复RRC连接请求的原因；在所述原因为基站通知区更新的情况下，进行小区重选；在重选至第二小区的情况下，在所述第二小区中发起恢复RRC连接请求，并重新启动所述第一定时器，以在所述第一定时器运行过程中等待接收基站发送的响应消息。
进一步地，在本申请实施例中，上述处理器14，还用于将所述第一定时器的超时次数加一，得到更新后的超时次数；在所述更新后的超时次数小于预设次数阈值的情况下，基于待重选小区列表进行小区重选。
进一步地，在本申请实施例中，上述处理器14，还用于降低所述第一小区在小区重选时的被选概率。
进一步地，在本申请实施例中，上述处理器14，还用于将所述第一小区从所述待重选小区列表中剔除、或降低所述第一小区在所述待重选小区列表中的排序权重。
进一步地，在本申请实施例中，上述处理器14，还用于在所述第二小区满足小区驻留条件、且所述第二小区广播的跟踪区标识和所述第一小区的跟踪区标识相同的情况下，表征重选至所述第二小区。
进一步地，在本申请实施例中，所述预设次数阈值为预先设置的次数阈值或者所述第一小区广播的建立连接参数值。
进一步地，在本申请实施例中，上述处理器14，还用于在所述原因不为所述基站通知区更新、或者所述更新后的超时次数大于或者等于所述预设次数阈值、或者基于所述待重选小区列表进行小区重选失败的情况下，所述终端切换至RRC空闲态。
进一步地，在本申请实施例中，所述第一定时器为T319定时器。
本申请实施例提供一种存储介质，其上存储有计算机程序，上述计算机可读存储介质存储有一个或者多个程序，上述一个或者多个程序可被一个或者多个处理器执行，应用于终端中，该计算机程序实现如上述的恢复RRC连接的方法。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本公开的技术方案本质上或者说对相关技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台图像显示设备(可以是手机，计算机，服务器，空调器，或者网络设备等)执行本公开各个实施例所述的方法。
以上所述，仅为本申请的较佳实施例而已，并非用于限定本申请的保护范围。

Claims (20)

  1. 一种恢复RRC连接的方法，所述方法包括：
    终端在第一小区发起恢复无线接入控制RRC连接请求并启动第一定时器；在第一定时器运行结束前未接收到基站发送的响应消息的情况下，获取发起恢复RRC连接请求的原因；
    在所述原因为基站通知区更新的情况下，进行小区重选；
    在重选至第二小区的情况下，在所述第二小区中发起恢复RRC连接请求，并重新启动所述第一定时器，以在所述第一定时器运行过程中等待接收基站发送的响应消息。
  2. 根据权利要求1所述的方法，其中，包括如下步骤：
    将所述第一定时器的超时次数加一，得到更新后的超时次数；
    在所述更新后的超时次数小于预设次数阈值的情况下，基于待重选小区列表进行小区重选。
  3. 根据权利要求1或2所述的方法，其中，包括如下步骤：
    降低所述第一小区在小区重选时的被选概率。
  4. 根据权利要求3所述的方法，其中，包括如下步骤：
    将所述第一小区从所述待重选小区列表中剔除、或降低所述第一小区在所述待重选小区列表中的排序权重。
  5. 根据权利要求4所述的方法，其中，包括如下步骤：
    在所述第二小区满足小区驻留条件、且所述第二小区广播的跟踪区标识和所述第一小区的跟踪区标识相同的情况下，表征重选至所述第二小区。
  6. 根据权利要求2所述的方法，其中，所述预设次数阈值为预先设置的次数阈值或者所述第一小区广播的建立连接参数值。
  7. 根据权利要求1或2所述的方法，其中，包括如下步骤：
    在所述原因不为所述基站通知区更新、或者所述更新后的超时次数大于或者等于所述预设次数阈值、或者基于所述待重选小区列表进行小区重选失败的情况下，所述终端切换至RRC空闲态。
  8. 根据权利要求1-7任一项所述的方法，其中，所述第一定时器为T319定时器。
  9. 一种终端，其中，所述终端包括：
    获取单元，配置为终端在第一小区发起恢复无线接入控制RRC连接请求并启动第一定时器；在第一定时器运行结束前未接收到基站发送的响应消息的情况下，获取发起恢复RRC连接请求的原因；
    小区重选单元，配置为在所述原因为基站通知区更新的情况下，进行小区重选；
    请求发起单元，配置为在重选至第二小区的情况下，在所述第二小区中发起恢复RRC连接请求；
    重启单元，配置为重新启动所述第一定时器，以在所述第一定时器运行过程中等待接收基站发送的响应消息。
  10. 根据权利要求9所述的终端，其中，所述终端还包括：更新单元；
    所述更新单元，配置为将所述第一定时器的超时次数加一，得到更新后的超时次数；
    所述小区重选单元，还配置为在所述更新后的超时次数小于预设次数阈值的情况下，基于待重选小区列表进行小区重选。
  11. 根据权利要求9或10所述的终端，其中，
    所述更新单元，还配置为降低所述第一小区在小区重选时的被选概率。
  12. 根据权利要求11所述的终端，其中，
    所述更新单元，还配置为将所述第一小区从所述待重选小区列表中剔除、或降低所述第一小区在所述待重选小区列表中的排序权重。
  13. 根据权利要求12所述的终端，其中，
    所述小区重选单元，配置为在所述第二小区满足小区驻留条件、且所述第二小区广播的跟踪区标识和所述第一小区的跟踪区标识相同的情况下，表征重选至所述第二小区。
  14. 根据权利要求10所述的终端，其中，所述预设次数阈值为预先设置的次数阈值或者所述第一小区广播的建立连接参数值。
  15. 根据权利要求9或10所述的终端，其中，所述终端还包括：切换单元；
    所述切换单元，配置为在所述原因不为所述基站通知区更新、或者所述第更新后的超时次数大于或者等于所述预设次数阈值、或者基于所述待重选小区列表进行小区重选失败的情况下，所述终端切换至RRC空闲态。
  16. 根据权利要求9-15任一项所述的终端，其中，所述第一定时器为T319定时器。
  17. 一种终端，其中，所述终端包括：处理器、存储器及通信总线；所述处理器执行存储器存储的运行程序时实现如下恢复RRC连接的方法：
    终端在第一小区发起恢复无线接入控制RRC连接请求并启动第一定时器；在第一定时器运行结束前未接收到基站发送的响应消息的情况下，获取发起恢复RRC连接请求的原因；
    在所述原因为基站通知区更新的情况下，进行小区重选；
    在重选至第二小区的情况下，在所述第二小区中发起恢复RRC连接请求，并重新启动所述第一定时器，以在所述第一定时器运行过程中等待接收基站发送的响应消息。
  18. 根据权利要求17所述的终端，所述处理器，还用于将所述第一定时器的超时次数加一，得到更新后的超时次数；在所述更新后的超时次数小于预设次数阈值的情况下，基于待重选小区列表进行小区重选。
  19. 根据权利要求17或18所述的终端，所述处理器，还用于降低所述第一小区在小区重选时的被选概率。
  20. 一种存储介质，其上存储有计算机程序，其中，该计算机程序被处理器执行时实现如权利要求1-8任一项所述的方法。
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